Insurance is an arrangement where an individual pays a company money and the company pays money to the individual if something unpleasant occurs, such as property damage or illness. Insurance protects against unexpected losses or expenses through a system where risks are shared. There are two main types of insurance - life insurance and non-life insurance, with the latter including types like motor vehicle, fire, health, and marine insurance. Insurance serves the dual purposes of providing security against short-term losses and supporting long-term national growth through capital formation.